I have been using these for over a year and it fits and feels the same as the first day I got it. I use these to train Jiu Jitsu and wrestling and when I roll I don't even notice I have it on. This has saved me from a couple of accidental knee and shin strikes and every time without feeling a thing. If I can move around fluently on the mats with this on there is no telling how many other sports or physical activities you can use this in.